Build a GF(2^m) irreducible polynomial BIGNUM from an exponent index array.
1 on success, or 0 on error.
| Name | Description |
|---|---|
| p | Descending list of set-bit indices p[0]> p[1]> ... > p[k]== 0, terminated by -1. |
| a | Destination BIGNUM cleared then filled with the polynomial representation. |